Thanks for starting this thread, Franck - I thought it was just me! I definitely found myself getting stuck at the end of moves, and I also get intimidated by more experienced women (especially the first time I dance with them, which therefore turns out to be the last as well!!).
I had the opposite problem with footwork, though - for ages I thought you were directly addressing me when you kept emphasizing that the leader should move, and not just yank the follower around (perhaps you were!

).
The other thing I found was when thinking ahead to the next move I would corrupt the move I was doing, so ending up trying to lead "in between" the two moves, completely confusing my partner :sorry .
Another thing I found difficult was recovering from a mistake. There are some moves where a lot of women instinctively offer their left hand instead of their right, and originally I had to just stop dancing and start again to recover from this

, although I'd like to think my improvisation has got a little better since then

.
Of course, this is just what
I thought I found difficult - maybe some of my partners could add a whole bunch more!!